Operating System (OS)
Sleep is a good mode to use because

It consumes low battery when you start it again
It saves power which in true is saving money
It makes computer fresh after it wakes up
All of the listed here

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Operating System (OS)
The necessary conditions needed before deadlock can occur?

Mutual Exclusion, No Hold and wait, Preemption, Circular Wait
Mutual Exclusion, Hold and wait, No Preemption, Circular Wait
Mutual Exclusion, Hold and wait, Preemption, No Circular Wait
No Mutual Exclusion, Hold and wait, Preemption, Circular Wait

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